Thanks for your response.
Let me tell you what I did. A syou suggested I truned the engine till the air was coming out of the spark plug 1 hole. The balancers "0" mark matched with the pointer above it. The distributer was close (not close enought to pass the current, engine mark and distributer mark matched at this point) to sparkplug cable one. I tried to cranked the engine and it made some noise but wouldn't start. I checked balancer mark it moved very little..looked like engine didn't turn at all it just made the cranking sound. I then turned distributer little bit anti-clockwise to match the sparkplug 1 and distributor stator(the top part which touch the terminals). Now I tried to start the engine again. This time it turned one full cycle probably but didn't start.
It was working fine earlier untill my friend changed the firing order to the staock one.Please advise.